Introduce `schema-mapping-backup.json` to support testing of database schema mappings. Includes column mappings, modifications, deletions, and additions across multiple tables for enhanced test coverage.
Introduced new features including database upgrade logic, schema comparison, and schema-based updates. Refactored main program structure for modularity. Added unit tests and updated configuration files to support upgrades and enhanced mapping functionality.
Added a check for potential modifications to determine whether the configuration should be saved. Introduced a new method `HasPotentialModification` in the `Configuration` class to identify one-time-enabled items and update the saving logic accordingly. Cleaned up and refactored related code for better readability and maintainability.
